write any two advantage of constructing sulabh shauchalaya. (2 mark)
Answers
Sulabh Shauchalaya (Two pit Pour flush Latrine) consists of a pan with a steep slope 25° - 28° and a trap with 20 mm water seal needing 1.5 to 2 litres of water fro flushing. The pan and trap of conventional design, which are used with flushing cisterns, should not be used in a pour flush latrine with leach pits, as it would need more water for flushing and the pit may not function properly.
The excreta is carried into leach pits through pipes or cover drains; one pit is used at a time. The liquid infiltrates into the soil through the holes in the pit lining. When one pit is full, excreta is diverted to the second pit. In about 18 months period, the content of the filled pit gets digested and becomes a safe organic manure for handling. The pit can then be conveniently emptied and is ready to be put back into use, after the second pit is full. Thus the pits can be used alternatively and continuously. The sludge from the pit is a good manure for use in horticulture and agriculture. The cost of emptying the pit can be recovered partially from the cost of manure in the pit. This technology opened new possibilities to promote sanitation, especially in developing countries like India.
ADVANTAGES
The following are the advantages of Sulabh Shauchalaya over other technologies:
Hygienically and Technically appropriate; Socio-culturally acceptable.
Low cost and easy to construct with locally available materials.
Design and specifications can be modified to suit the user's needs and affordability.
It eliminates mosquito, insect and fly nuisance; Can be constructed in different physical, geological and hydrogeological conditions; free from health hazards and does not pollute surface or ground water, if proper precautions and safeguards are taken during construction
It can be located within the house as it is free from foul smell and fly/ mosquito nuisance; Can be constructed on upper floors of houses also.
Pits are generally designed for 3 years desludging interval, but if desired they can be designed for longer periods or it can be reduced to even 2 years.
The maintenance of Sulabh Shauchalaya's is easy and simple and it costs very little.
It needs only 1.5 to 2 litres of water for flushing compared to 12 - 15 litres required by conventional flush toilets.
Less space than is required for septic tank latrine.
It does not need scavengers for cleaning pits or disposal of sludge; This can be done by the householders himself or by a labourer; makes available rich fertilizer and soil conditioner.
It can be easily connected to sewers; A low volume flushing cistern can be attached to avoud pour fushing.
No vent pipe is required in Sulabh Shauchalaya's, as gases disperse into the soil thereby removing the nuisance of foul smell spreading in the neighbourhood.
WHY TWO PITS?
Single leach pits are appropriate only if they can be desludged mechanically by a vacuum tanker, since their contents are not pathogen free. In two pit system, since one pit is used at a time, the filled up pit can be cleaned manually even by the householder himself because of the long period of digestion which makes it pathogen free and eradicates foul smell.
In a single pit system, desludging has to be done almost immediately after the pit has been filled to enable its reuse; This involves handling of fresh and indigested excreta which can be hazardous to health.
If a dipper with a larger single pit is provided, desludging operation will be difficult and there will be more chances of pollution especially where ground-water table is high.
OPERATION AND MAINTENANCE
Operation and maintenance of Sulabh Shauchalaya is very easy and simple:
Before use, wet the pan by pouring little quantity of water.
After defecation pour 1.5 to 2 litres of water in the pan for flushing.
Pour about half a litre of water in the pan after urination.
The pan should be cleaned once a day with a brush/ broom and with soap powder periodically.
One pit is to be used at a time by plugging the mouth of the other drain.
Kitchen/ bathroom wastewater or rainwater should not be allowed to enter the pits.
Other solid waste like kitchen waste, rags, cotton, sweepings etc. should not be thrown in the pan; This could block the latrine.
To remove choking in the trap, do rodding from the pan and the rear side by means of a split bamboo stick.
When the pit in use is full, the flow should be diverted to second pit and the filled up pit should be desludged after 1.5 to 2 year rest period.
The first pit can then be put to reuse when second pit is full.
IMPACT OF SULABH TECHNOLOGY